--  @testpoint:opengauss关键字role(非保留)，作为函数名
--关键字不带引号-成功
drop function if exists role;
create function role(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--清理环境
drop function role;

--关键字带双引号-成功
drop function if exists "role";
create function "role"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
drop function "role";

--关键字带单引号-合理报错
drop function if exists 'role';
create function 'role'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/

--关键字带反引号-合理报错
drop function if exists `role`;
create function `role`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/